Roll-changer for web-printing presses.



. L. F. PFISTER. non CHANGER ro wE Pmmme PREssEs.

APPLICATION FILED .IULY 31.1913- Patented Dec. 18, 1917'.

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L. I". PFISTER.

ROLL CHANGER FOR WEB PRINTING PRESSES.

APPLICATION FILED .IULY3I, 1913.

Patented Deo. 18, 1917.

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RoLL CHANGER EoR WEB PR|NT|NG PRESSES.

APPLICATION FILED JULY 31,1913.

1,250,217. Patenteme. 18,1917.

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MFG. oo., 0E MILWAUKEE,

NEW YORK, ASSIGNOR V WISCONSIN, A CORPORATION OF WISCONSIN.

To THE CUTLERHAMMEE.

ROLL-CHANGER FOR WEB-PRIN TIN G PRESSES.

Specification of Letters Patent.

Application led July 31, 1913. Serial N o. 782,330.

To all whom t may concern.'

Be' it known that I, Louis F. PFISTER, a citizen of the United States,residin at Flatbush, Brooklyn, in the county of Klngs and State 0f NewYork, have invented new and useful Improvements in Roll-Changers forWeb-Printing Presses, of which the following is a full, clear, concise,and exact description, reference being had to the accompanying drawing,forming a part of this specification.

This invention relates to roll changers for web printing presses.

he modern highspeed web pr1nt1ng press requires a web roll of largesize. Space limitations in printing establishments, however, requirethat the space allotted to each press be reduced to a minimum.

An object of provide a roll changer for web printing presses by means ofwhich the rollsmay be changed in a minimum space.

Another object of the invention is to provide -improved means by whichthe new roll maybe easily and rapidly substituted for a spent rollwithout interfering with the contlnuous operation of the press.

A preferred form which this invention may assume is illustrated in theaccompanying drawings, in which:

Figure 1 is a side'elevation.

Fig. 2 is a section on a plane parallel to the elevation shown in Fig.1, illustrating the positions assumed by the various parts during theoperation of changing the rolls. Fig. 3 is a plan view with the drivmgshaft omitted. v

Fig. 4 is VTa .vertical section on the l1ne A-B, Fig. 3.

Fig. 5 is an enlarged longitudinal section through a web roll and itsshaft.

Fig. 6 is a section on the line C-D, Fig. 5.

A pair of parallel roll supporting larms 1 and 2 are each supported ontrunmons 3 which have their bearings'in any convenient support which maybe a portion of the press frame. Each end of the said arms is slotted asat 4 and 5 to provide slideways for split bearing boxes 7, 8, 9 and 10in which web roll shafts 11 and 12 are rotatably mounted. Springs 13uphold the bearing boxes in the outer ends of the slideways. The bearingboxes are prevented from being forced Out of the slideways by removablelocking the present-invention is to pins 14 inserted through eye bolts15 in the end of the arms and engaging slotted projections 16 ing box.eats for each end of the springs are provided by stubs 17 and 18projecting respectively from the inner ends llof the slideways and theinner sections of the bearing boxes.

Patented nee. is, i917.

on the outer portion of each bear- -Each web roll shaft is provided witha I pair of grooved rollers 19 removably mounted on the shaft and,except as hereinafter explained, freely rotatable with relation thereto.One roller of each pair is provided with a pair of pivoted springpressedpawls 20 adapted to coperate with a ratchet 21 keyed to thesha-ft. Asillustrated in Fig. 5, the ratchet may be carried by the extended end ofa chuck 22 which cooperates with a chuck 23 to position the web roll onthe shaft. If desired, each of the rollers may be provided with Athespringpressed pawls, in which case, of course, ratchets wouldl beprovided on each of the chucks.

The grooved rollers coperate with a pair of curved tracks 24 arrangedbetween the roll supporting arms and preferably secured to anyconvenient portion of the press frame. The tracks describe an arc ofcomparatively large radius, each track extending between thecorresponding ends of the roll shafts.

Suitable tension devices of any preferred type may be employed tocontrol the un winding of'the web. As illustrated, each web roll shaftmay be provided with `a brake drum 25. Adjustable brake bands 26 and 27pivoted at 28 and 29 to sliding blocks 30 coperate with each drum. Thefree ends of each pair of brake bands are adjustably drawn together byscrews 31. Suitable guideways 32 are provided for the sliding blocks sothat the brake bands may slide with the roll shafts as hereinafterdescribed. It is customary in web roll `presses to provide means foradjusting the rolls longitudinally so that they may accurately alinewith the printing mechanism. In order to pro.

vide for this adjustment the rollers 19 have been made slightly widerthan and the guideways 32 have been arranged to permit the necessaryslight movement of the blocks 30. Adjusting screws 33 arethreadedthrough the blocks 30 and into any conthe' tracks y portingarms.

' mine this adjustment. By changing the adjustment of the screws theroll shafts may `be moved longitudinally a slight distance to properlyaline the rolls.

rlhe arms 1 and 2 carrying the-web roll shafts may be rotated about thetrunnions 3 by any preferred mechanism. As illustrated, a worm-wheel 34carried byone trunnion is driven by a worm 35 on a driven shaft 36.Motion is communicated to the opposite trunnion through miter gears 37and connecting shafts 38 so that the arms rotate in unison. l

In Fig. 1 web roll`39 is supplying the paper which is drawn from theroll through a pair of nipping rollers 40 over an automatic tensionroller 41 into the-press. This web roll being nearly spent, a new roll42 is represented as having been placed in position on the opposite endsof the roll sup- This is accomplished .by re` moving the locking pins14, the split bearing boxes and removable grooved rollers, permitting anew roll to be readily placed on the web roll shaft. v

The arms are then rotated about their trunnions in a clockwise directionby means of the gearing described. As the arms ro-4 tate the filled rollis moved inwardly toward Y the trunnions by means of its grooved rollers19 .which ride on the tracks 24.

The slideways formed by the slots 4 in the arms and the `guides 32 forthe brake band block permitfree movement of the roll shaft against thetension of the spring 13. At the same time rotation is imparted to theroll 42 by means of the ratchet connection between the rollers 19 andthe core of the roll. As the roll is moved farther toward the left (Fig.2) it comes in contact with the web being drawn from the dischargingroll39. At this instant suflicient speed'of rotation is imparted to roll42 to cause its peripheral speed to substantially equal the speed of theWeb as it is drawn into the press. By means of an adhesive previouslyapplied to the free end of the web onthe roll 42, the fresh web isautomatically pasted to the web from the roll 39 and is drawn into thepress, the ratchet connection now permitting the web to be drawn olffreely.

The web from the roll 39 is then broken by a flystick or other means.rlhe spent roll may now be readily removed and another roll substitutedin preparation for the next change.

lin the embodiment illustrated the full roll is shown as drawn upout ofthe way to economize vertical space, although it is apparent tha-t byrepositioning the tracks, space in any other direction may beeconomized.

rlfhe illustration here given represents merely the preferred embodimentof the insigned vention as it is apparent that many modiications may bemade which fall equally within the scope of the invention.

What ll claim as new and desire to secure by Letters Patent is 1. Thecombination with a printing press in which the web roll is rotated bythe webbeing unwound therefrom, of a roll changer comprising a movablesupport adapted to carry a plurality of web rolls, means for moving saidsupport to move a full roll into the position of a spent roll, saidsupport being designed to bring the full roll into contact with the webfrom the spent roll, and means for imparting a rotary motion to saidfull roll before it makes contact with the web from the spent roll.

2. A roll changer for printing presses comprising a movable supportcarrying a plurality of web rolls, means for moving said support to movea full roll into the position of a spent roll, said support being detbbring the full roll into contact with the web from the spent roll, andmeans for rotating said full roll as it is moved to 9o replace the spentroll, said last named means y acting only during the movementof thesupport.

3. A roll changer for printing presses comprising a movable supportcarrying a plurality of web rolls, means for moving said support to movea full roll into the position of a spent roll, said support beingdesigned to bring the full roll into contact with the web from the spentroll,'and sta- 100 tionary means adapted to impart a rotary motion tothe full roll as it is moved to rev place the spent roll. A l

4. A roll changer for printing presses comprising a movable supportcarrying a plurality of Web rolls, means for moving said support to movea full roll into the position of a spent roll', said support beingdesignedy to bring the' full roll into contact with the web from thespent roll, and means 11o coperating with the web roll spindle forimparting a rotary motion to the full roll as it is movedto replace thespent roll.

5. A roll changer for printing presses comprising a movable supportcarrying a plurality of web rolls, means for moving said' support tomove a full roll into the pon sition of a spent roll, said support beingdesigned to bring the full roll into contact with the web from the spentroll, and means independent of the regular web roll rotating means forrotating the full roll as it is moved to replace the spent roll. ,if

6. A roll changer for -printin'g presses comprising a movable supportcarrying a plurality of web rolls, means for moving said support to movea full roll into the position of a spent roll, said support beingdesigned to bring the full roll into contact with the web from the spentroll, and a guide said full roll is moved to replace said 25 each endthereof,

i comprising a movable support with the spindle of coperating with ytheroll spindle of the full roll to rotate said roll as it is moved to replace the spent roll.

7. A roll changerv for printing presses comprising a movable support, aplurality of web rolls mounted thereon, means for moving said support tomove a full roll to the position of a spent roll, said support beingdesigned to bring the full roll into contact with the web from the spentroll, and means coperating with the roll spindle of the full roll torotate said full roll in the direction of travel of the web of the spentroll as said `full roll is moved to replace said spent roll.l

8. A roll changer for printing presses comprising a movable support, aplurality of Web rolls mounted thereon, meansI for moving said supportto the position of a spent roll, and means cooperating With the rollspindle of the full roll to rotate said full roll in tho direction oftravel of the web of the spent roll as spent roll, and means forpreventing said full roll from rotating in the opposite direction.

9. A roll changer for printing presses comprising a movable supportcarrying a plurality of Web rolls, means for moving said support to movea full roll to the position of a spent roll, means independent of theregular web roll rotating means for rotating the full roll in thedirection of move- `ment of the Web of the spent roll as the full rollis moved to replace said spent roll, and means for preventing said fullroll from rotating in the opposite direction.

10. A roll changer for printing presses pivoted near its center andcarrying a web roll adjacent each end thereof, means for rotating thesupport to move a full roll to the position of a spent roll, and meansfor automatically moving one of said rolls toward the center of saidsupport as ysaid support-is rotated whereby the positions of the rollsmay be changed in a minimum space.

11. A roll changer for printing presses comprising a movable supportpivoted near its center and carrying a Web roll adjacent means forrotating the support to move a full roll to the position of a spentroll, means for automatically moving one of said rolls toward the centerof said support as said support is rotated whereby the positions of therolls may be changed in a minimum space, and means coperating the fullroll for rotating said full roll in the direction of travel of the webof, the spent roll as the full roll is moved to replace said spent roll.

12. A roll changer for printing presses comprising a movable supportadapted to carry a plurality of web rolls, means for moving said supportto move a full roll into move a full roll to the position of a spentroll, and means for moving one of said rolls toward the other as the1rpositions are changed so thatthe change may be made in a minimum space.

13. A roll changer for printing presses comprising a movable supportadapted to carry a plurality of Web rolls, means for moving said supportto move a full roll into 'the vposition of a spent roll, and means forrotating said full roll as it is moved to replace the spent roll, saidmeans being adapted to move the full roll toward the spent roll as theirpositionsare change 14. A roll' changer for printing presses comprisinga movable support pivoted near its center, web roll spindles movablymount- 'ed on said support on each side of said pivot, said spindlesbeing yieldingly held near the ends of said support, means for movingsaid support about its pivot to interchange the positions of saidspindles, and means for moving one of said spindles toward the pivotduring the movement ofthe support so that the interchange may be made-ina minimum space. l

l5. A roll changer for printing presses comprising a movable supportpivoted near its center, web roll spindles movably mounted on saidsupport on each side of said pivot, means for moving said support aboutits pivot to interchange the positions of said spindles, and means formoving one of said spindles toward the pivot and for rotating saidspindle during the movement of the support to replace the spent rollwith a full ro 16. A roll changer for printing presses comprising. amovable support pivoted near its center, ed on said support on each sideof said pivot, said spindles being yieldingly held near the ends of saidsupport, means for moving said support about its pivot yto interchangethe positions of said spindles and an arcuate guide adapted to move oneof said spindles toward the lpivot of the support and to ro- -tate saidspindle during the movement of the support to interchange the positionsof the spindles.

17. A roll changer for printing presses comprising a movable supportpivoted near its center, web roll spindles rotatably mounted in slidablebearings yieldingly held near the ends of said support, means for movingsaid support about its pivot to interchange web roll spindles movablymountthe positions of said spindles and an arcuate guide adapted to moveone of said spindles toward the pivot of said support and to rotate saidspindle during the movement of the support to interchange the positionsof said spindles. v p K 18. The combination with a printing press inwhich the web roll is rotated by the web being unwoundtherefrom, of aroll changer comprising a movable support adapted to carry a pluralityof web rolls, means for moving said support to move a full roll into theposition of a spent roll, said support Vbeing designed to bring the fullroll into contact with the web from the. spent roll,

driving means for imparting a rotary motion to said full roll before itmakes contact with the web from the spent roll and means whereby thefull roll may be rotated indepress in which the web roll is rotated bythe 2@ web being unwound therefrom, of a roll changer comprising amovable support adapted to carry a plurality of web`rolls,

means for moving said support to move a full roll into the position of aspent roll, 2a said support being designed to bring the full roll intocontact with the web from the spent roll,` driving means for imparting arotary motion to said full roll before it makes contact with theweb fromthe spent roll and a pawl and ratchet associated with the driving meanswhereby the full roll may be rotated 'independently of the drivingmeans.

21. A roll changer for printing presses comprising a movable support,means for moving said support, aplurality of web rolls slidably mountedon the support, means for causing one of said rolls to ap- -proach theother as the support is moved lo and means for automatically returningthe roll to its original position relative to the support as the supportreaches the end of its movement.

22. A roll changer for printing presses e5 comprising a movable support,a plurality of web rolls mounted thereon, means for moving the supportto shift a full roll to the position of a spent roll, means for rotatingthe full roll in the direction of travel of the 5o web as said roll ismoved to replace the spent roll and means for insuringthat the rollrotates in one direction only.

23. A roll changer for printing presses having a movable support adaptedto carry a plurality of web rolls, means for moving said support, meansfor causing one of said rolls to be moved relative to the support assaid support is moved and means for automatically returning said roll tooriginal position relative to the support.

24. A roll changer for printing presses comprising a pivoted support, aplurality of web rolls slidably mounted on said support, means formoving said support, an

arcuate guide adapted to movefone of said rolls relative to said supportand to impart a rotary motion to the roll and means to insure that therotation is in one direction only.

ing presses, a rotatable r'oll carrier, a web roll mounted adjacent oneend thereof, and means whereby as said roll carrier is rotated said webroll is moved inwardly from the end thereof.

26. ln a rapid roll changer for web printing presses, a rotatable rollcarrier, a pair of web rolls mounted thereon, means for rotating saidroll carrier to interchange the positions of said rolls, and automaticmeans for moving one of said rolls toward the pivot of said carrier assaid carrier rotates.

27. ln a rapid roll changer for web printing presses, a pair ofrotatable slotted roll supporting arms, a pair of web rolls rotatable inbearings slidable in the slots in said 25. ln a rapid roll changer forweb print.-l

arms, guide rails adjacent said arms, and

means on said web rolls coperating with said guide rails to cause saidbearings to slide insaid slots as said arms are rotated.

28. ln a rapid roll changer for web printing presses, a pair ofrotatable slotted roll supporting arms, a pair of web rolls rotatable inbearings slidable in the slots in said arms, guide rails adjacent saidarms, and means on said web rolls coperating with said guide rails tocause said bearings to slide in said slots as said arms are rotated.

29. lin a rapid roll changer for web printing presses, a pair ofrotatable roll supporting arms, a pair of web rolls rotatably mounted inbearings slidable on said arms, curved tracks adjacent said arms, andmeans on said web rolls coperating with said tracks whereby as said armsare rotated said web rolls are caused to slide relatively to said arms.

30. ln a rapid roll changer for web printing presses, a pair ofrotatable roll supporting arms, a pair of web rolls rotatably mounted inbearings slidable on said arms, means tending to hold said bearingsadjacent the ends of said arms, curved tracks adjacent said arms, andmeans on said web rolls coperating with said tracks whereby as said armsare rotated said web rolls are caused to slide against the action ofsaid holding means and relatively to said arms.

31. ln a rapid roll'changer for' web printing presses, a pair ofrotatable roll supporting arms providedwith longitudinal slots extendinginwardly from the ends thereof, a pair 0f web roll shafts rotatably andslidably mounted in said slots, springs forcing said shafts to the outerends of said slots, a pair of curved tracks each extending approXimatelybetween the ends of the arms,

shafts, and a pawl and ratchet connection 13@ between said rollers andsaid web rolls whereby as said arms are rotated said rollers may causeone of said web rolls to slide inwardly in said slots and simultaneouslyto rotate.

32. In a' rapid roll changer for web printing presses, a pair ofindependently rotatable roll supporting arms provided4 with longitudinalslots extending inwardly from the ends thereof, means for causing saidarms to rotate in unison, a pair of web roll shafts rotatably andslidably mounted in said slots, springs for forcing said shafts to theouter ends of said slots, a pair of curved tracks each extendingapproximately between the opposite ends of the arms, rollers on saidroll shafts coperating with said tracks, web rolls mounted on said rollshafts, and connections between said rollers and rality of web rolls,means for rotating said support to move a full roll into the position ofa spent roll, and means for rotating said full roll as it is moved toreplace the spent roll, said last named means acting only during themovement of the support.

In witness whereof, I have hereunto subscribed my name in the presenceof two witnesses.

LOUIS F. PFISTER. Witnesses: H. NIVLING,

THEO. J. TRUsLoW.

